<template>
  <div>
    <!--面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片效果-->
    <el-card>
      <!--搜索区域-->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            class="input-with-select"
            v-model="queryInfo.query"
            clearable
            @clear="getUserList"
          >
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible=true">添加用户</el-button>
        </el-col>
      </el-row>
      <!--用户列表区域-->
      <el-table :data="userList" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <!--作用域插槽-->
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <!--作用域插槽-->
          <template slot-scope="scope">
            <el-tooltip
              effect="dark"
              content="修改按钮"
              placement="top-start"
              :enterable="false"
              @click="showEditDialog"
            >
              <!--修改按钮-->
              <el-button
                type="primary"
                icon="el-icon-edit"
                size="mini"
                @click="showEditDialog(scope.row.id)"
              ></el-button>
            </el-tooltip>
            <el-tooltip effect="dark" content="删除按钮" placement="top-start" :enterable="false">
              <!--删除按钮-->
              <el-button
                type="danger"
                icon="el-icon-delete"
                size="mini"
                @click="removeUserById(scope.row.id)"
              ></el-button>
            </el-tooltip>
            <el-tooltip effect="dark" content="分配按钮" placement="top-start" :enterable="false">
              <!--分配按钮-->
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!--分页区域-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="this.queryInfo.pagenum"
        :page-sizes="[1,2,3,4]"
        :page-size="this.queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="this.total"
      ></el-pagination>
    </el-card>

    <!--添加用户对话框-->
    <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <!--prop对应具体校验规则-->
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password" show-password>
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!--修改用户对话框-->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <!--prop对应具体校验规则-->
        <el-form-item label="用户名" prop="username">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogClosed">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!--分配角色对话框-->
    <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClosed">
        <div>
          <p>当前用户：{{ userInfo.username }}</p>
          <p>当前角色：{{ userInfo.role_name }}</p>
          <p>分配新角色：
            <el-select v-model="selectedRoleId" placeholder="请选择">
              <el-option
                v-for="item in rolesList"
                :key="item.id"
                :label="item.roleName"
                :value="item.id">
              </el-option>
            </el-select>
          </p>
        </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    const checkEmail = (rule, value, cb) => {
      const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
      if (regEmail.test(value)) {
        return cb()
      } else {
        cb(new Error('请输入合法邮箱'))
      }
    }
    const checkMobile = (rule, value, cb) => {
      const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
      if (regMobile.test(value)) {
        return cb()
      } else {
        cb(new Error('请输入合法手机'))
      }
    }
    return {
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 2
      },
      userList: [],
      total: 0,
      addDialogVisible: false,
      editDialogVisible: false,
      addForm: {},
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '用户名的长度长度在3到10个字符之间',
            trigger: 'blur'
          }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '用户名的长度长度在6到15个字符之间',
            trigger: 'blur'
          }
        ],
        email: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      editForm: {},
      editFormRules: {
        email: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入用户手机', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 角色对话框是否可见
      setRoleDialogVisible: false,
      // 用户信息
      userInfo: {},
      // 角色列表
      rolesList: [],
      // 选中的角色ID
      selectedRoleId: null
    }
  },
  created () {
    this.getUserList()
  },
  methods: {
    async getUserList () {
      this.queryInfo.pagenum = 1
      const { data: res } = await this.$http.get('/users', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
        return
      }
      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听 page size 改变事件
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听 page 改变事件
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 状态改变事件
    async userStateChanged (userInfo) {
      const { data: res } = await this.$http.put(
        `/users/${userInfo.id}/state/${userInfo.mg_state}`
      )
      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        this.$message.error(res.meta.msg)
        return
      }
      this.$message.success(res.meta.msg)
    },
    // 重置输入框
    addDialogClosed () {
      // 重置不是清空，而是将数据恢复为默认值
      this.$refs.addFormRef.resetFields()
    },
    // 添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post('/users', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error(this.meta.msg)
        }
        this.addDialogVisible = false
        this.getUserList()
      })
    },
    // 展示用户修改的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`/users/${id}`)
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
        return
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 关闭用户修改的对话框
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
      this.editDialogVisible = false
    },
    // 修改用户信息并提交
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put(
          '/users/' + this.editForm.id,
          {
            email: this.editForm.email,
            mobile: this.editForm.mobile
          }
        )
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
          return
        }
        this.getUserList()
        this.editDialogVisible = false
        this.$message.success(res.meta.msg)
      })
    },
    // 根据id删除对应的用户信息
    async removeUserById (userId) {
      const confirmResult = await this.$confirm(
        '是否删除用户?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err) // 取消会触发异常错误，所以直接catch即可
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消删除')
        return
      }

      const { data: res } = await this.$http.delete('/users/' + userId)
      if (res.meta.status !== 200) {
        this.$message.info(res.meta.msg)
      } else {
        this.getUserList()
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
      }
    },
    // 分配角色
    async setRole (userInfo) {
      this.userInfo = userInfo
      // 在展示对话框之前获取所有的角色列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 更改用户角色
    async saveRoleInfo () {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择用户角色')
      }
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectedRoleId })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.setRoleDialogVisible = false
      return this.$message.success('更新用户角色成功')
    },
    // 分配角色对话框的关闭事件
    setRoleDialogClosed () {
      this.selectedRoleId = null
      this.userInfo = {}
      this.getUserList()
    }
  }
}
</script>
<style lang="less" scoped>
</style>
